Originally Posted By: m37charlie
Originally Posted By: Bluestream
try a 5W20
That is not such a great idea, a 5W20 has very low viscosity at running temperature, virtually all diesels - passenger car, light truck, heavy truck - are designed for oils with the viscosity of a heavy 30, or 40 oil at 100C. and 150C. (HTHS).
You will find the consensus opinion on this forum will be to run a diesel rated 15W40, unless winter temps drop below +10F (-12C.), in which case a diesel rated 10W30 or 5W40 would be desirable.
Since you know about ACEA ratings, an E2, 3, 5 or 7 oil that can be obtained in North America is the type I would recommend. Examples are Delo400, Rotella T, Delvac, etc...
If you really want a synthetic because you will be going to the colder parts of BC in the winter all the above come in 5W40 synthetic.
Charlie
I know nothing about ACEA ratings hence my post.
Also agreed, I would never use a 5w20 in a diesel, I'll have no bearings left,
I don't feel running a 50 weight in winter is that much of a difference from 40, especially a synthetic. Right now, its close to freezing and it pours like water, not molasses like the 15w40 dino oil I have.
I just want to know if the ratings I posted are ok for an IDI diesel engine, or old school soot collector, lol!